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All Journal Transmisi Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia
Yuda, Dimas
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Environmental Science Industrial & Manufacturing Engineering

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Effectiveness Comparative of The AG-666 Condenser with Re-Design In Producing Distillate for The AT-460 Distillation Tower Feed Kusuma, Daffa Meifan; Yuda, Dimas; Fahriani, Vera Pangni
TRANSMISI Vol. 21 No. 1 (2025): March (2025)
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v21i1.14479

Abstract

PT. Sintas Kurama Perdana is the only formic acid production plant in Indonesia. The company places high attention on the daily operating conditions of its production process, ensuring that every parameter, such as flow rate, temperature, pressure, and components, is maintained according to the set point. In the production process of methyl formate and formic acid, optimization of operational conditions, especially in the heat exchanger unit, is the main focus. The shell and tube type heat exchanger, specifically with the code AG-666, is used to condense the AT-660 distillate vapor output. This study assesses whether the AG-666 is capable of total condensation without the need for the assistance of the AG-667 condenser in anticipation if the AG-667 does not function. The analysis is carried out based on the clean overall coefficient (Uc), design overall coefficient (Ud), fouling factor (Rd), efficiency, and effectiveness for actual design conditions and re-design. The data owned from the initial design of the survival is the Uc value of 1525 W/m2.K, Rd value of 0.00032 m2.K/W, efficiency of 82%, and effectiveness of 75%. The actual condition of the heat exchanger has a Uc value of 801.71 W/m2.K, Ud value of 104.62 Btu/ft.h.℉, Rd value of 0.000436 m2.K/W, efficiency of 74%, and effectiveness of 50%. Re-Design shows that increasing the number of passes (4 passes in the shell and 8 passes in the tube) allows single-stage condensation at an outlet temperature of 32 °C without non-condensable gases such as CO. Comparison between the initial design and the re-design results shows an increase in efficiency of 80% and effectiveness of 57.78%, with Uc 725.83 W/m2.K and Ud 102.27 Btu/ft.h.℉. The redesign provided better performance than the original design, although actual efficiency was slightly lower.
Production of HCl Activated Carbon From Rice Husk Waste Alwardah, Chairunnisa; Kusuma, Daffa Meifan; Bagastama, Bima; Yuda, Dimas; Wahyuningtyas, Aulia; Aeni, Alfieta Rohmaful
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 9, No 2 (2024): EDISI SEPTEMBER 2024
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v9i2.6102

Abstract

Rice husks are agricultural waste whose utilization is not optimal because the waste is usually only burned. Agricultural waste that is burned will harm the environment. Chemical contents such as cellulose and lignin in rice husks can be used to make active carbon. This research aims to determine the optimum operating conditions for producing carbon, obtain information regarding functional groups and changes in pore surface area on carbon before and after activation, and determine the effect of chemical activator HCl on the carbon produced. Rice husks were carbonized using a furnace at temperatures of 200°C, 250°C, and 300°C for 30, 60, and 120 minutes, followed by chemical activation using HCl for 12, 24, and 36 hours. The research results showed that the carbonization variation of 300°C at 120 minutes was closest to SNI standards: water content of 3.91%, ash content of 14.63%, volatile content of 20.01%, and fixed carbon content of 65.36%. Activation of HCl causes the appearance of carboxylic acids. Chemical activation of HCl for 12 hours resulted in proximate content that was close to the SNI 06-3730-1995 standard and resulted in the husk carbon having a larger pore surface area, namely 141,369 m2/g, compared with the pore surface area of the husk carbon before activation was 118,083 m2/g.
Co-Authors Aeni, Alfieta Rohmaful Alwardah, Chairunnisa Bagastama, Bima Kusuma, Daffa Meifan Vera Pangni Fahriani Wahyuningtyas, Aulia